Details:  fix behaviour of 'r'

    Details:  was not recorded onh the undo stck

    Task:     180315
    RevBy:
    Details:

    Details:  prevent creation of empty "groups" that required
additional 'u' key strokes to 'undo'

    Details:  was broken due to wrong cursor selection approach

Many singletons have their own instance() method, in which case there is
no need to use ICore::instance() to get access to them.

    RevBy:    partially by dt

The instance method has been moved to ICore, so there is generally no
need to include coreimpl.h anymore. Many objects accessed through this
core instance also had their own static instance methods.

Don't display the useless "Other" category, since the categorization of
commands isn't used anywhere (candidate for removal).

Filter out accelerator ampersands, since they aren't interesting here
and reduce the effectiveness of searching.

This makes both source and log files more readable and also prevents
gdb from applying extra quoting of its own.

Requested by danimo

Simple solution after all. This idea got initially dropped early in the
process because it does not handle binary data and using x/x was
way to slow. But since we use only printable characters now thanks
to base64 encoding etc using 'p' becomes feasible again and simplifies
the process vastly as no additional communication channel is needed anymore.

Details:  Creator on Linux works now in two modes:
          1) out of the build dir (shadow builds to be tested)
          2) make INSTALL_ROOT=/prefix install

Details:  Make install works now, we just have to agree on layout
details and check for mac compatibility.

Also, plugins will carry no version in their filename anymore starting with
this commit. Versioning happens in the creators pluginloader using the pluginspec file.

Details: Moving files so that the local layout corresponds to the layout pushed by make install.
Adjust Make target, modify the resource path of the loader to find the resources in the
right place. All pathes are still looked up relative to binaryPath(), libs are found via
relative rpath.

Task:     - none
RevBy:    - Andre

there anymore

Since it's checkable now, "Show Sidebar" is more suitable. Also changed
the interface a bit to allow more than just toggling.